Neurologic History and Examination -...
Transcript of Neurologic History and Examination -...
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Neurologic History and Examination
Ivo Bekavac, MD,PhD
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History
• The same as any history
• Age
• Chief complaint
• History of present illness
• Past medical history
• Social history
• Family history
• Review of systems
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General physical examination
• Vital signs (BP, HR, RR, temp)
• Skin
• HEENT (Head, Eyes, Ears, Nose & Throat)
• Check for CAROTID and OCULAR BRUITS
• Chest and cardiovascular (Heart murmur, rhythm)
• Abdomen ( bruit, organomegaly )
• Extremities ( atrophy, cold, pulses)
• Rectal
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The detailed neurological examination in adults
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A SCREENING NEUROLOGIC EXAMINATION
For screening purposes in patients without neurologic complaints
• MENTAL STATUS
• CRANIAL NERVES
• MOTOR SYSTEM
• REFLEXES
• SENSATION
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MENTAL STATUS EXAMINATION
• Level of consciousness (arousal)
• Attention and concentration
• Memory (immediate, recent and remote)
• Language
• Visual spatial perception
• Executive functioning
• Mood and thought content
• Praxis
• Calculation
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Arousal
While taking the history and examining the patient observe:
• Alert
• Attentive
• Sleepy
• Unresponsive
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Attention and concentration
Attention – the ability to focus and direct cognitive processes and to resist distraction
Concentration – the ability to focus and sustain attention over a period of time.
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Memory
Impaired memory is a common complaint which may be presented by patients and/or family members.
MULTIPLE DIMENSIONS:
• Immediate and working
• Recent
• Remote
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Language
• Fluency
• Content (paraphasic errors and neologisms)
• Repetition (“no ifs, ands or buts”)
• Naming
• Comprehension
• Reading
• Writing
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Visual spatial perception
• History: losing objects, getting lost, difficulty navigating
• Perceptual and constructional abilities (copying, drawing)
• Clock drawing
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Praxis
• Praxis (ideomotor) – performance of learned motor movement in the absence of primary deficit in motor and spatial abilities.
• Difficulty dressing, feeding and bathing.
• Ideational praxis – “take this piece of paper, fold it in half, and place it in the envelope”
• Relatively common feature of corticobasal degeneration
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Calculations
• “serial seven”
• Sensitive to impaired attention and performance (test), anxiety and to the patient’s educational level
• Acalculia
• Left angular gyrus lesion (Gerstmann syndrome), dementia
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Executive functioning
• Complex set of capacities including planning, purposive action and effective performance that enable a person to engage successfully in appropriate, goal-directed, socially responsible, and self-serving behavior.
• Prefrontal cortex and their connections through the caudate nuclei
• Impairments in insight and judgment are early indicators of executive dysfunction
• Evaluation is difficult, neuropsychological testing
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Mood and thought content
• Mood and emotional state have a strong impact on mental status and cognitive functioning.
• Depression
• Apathy
• Pseudobulbar palsy
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Others
• Right-left orientation, finger agnosia (Gerstmann syndrome – in addition to dysgraphia, acalculia) – posterior left hemisphere- angular gyrus
BRIEF COGNITIVE ASSESMENT
• Mini-mental status examination (MMSE) – 0-30
• Clock drawing
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CRANIAL NERVE EXAMINATION
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Olfaction (CN I)
• Almost never tested
• If no history of olfactory problem, no need to test it.
• Test: occlude one nostril (coffee, peppermint, cinnamon)
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Vision (CN II)
• Visual fields
• Acuity
• Fundoscopic examination
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Visual fields
• Confrontation
• Humphrey visual field
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Acuity
• Hand-held visual acuity card -14 inches in front of the patient’s eye
• 20/20 normal
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Fundoscopic examination
• Right eye examine with your right eye
• Reduce the room illumination
• Ask the patient to look straight ahead
• Optic disc (clarity of the disc outline, venous pulsations, retinal vessels)
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Pupillary light reflex (CN II and III)
• Shine a penlight on the bridge of the patient’s nose
• Swinging flashlight
• Afferent pupillary defect
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Eye movements (CN II, IV and VI)
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Nystagmus
Ocular oscillations (can occur in normal subjects, drug induced, vestibular or cerebellar dysfunction)
Jerk nystagmus – repetitive, quick movement of the eyes in the opposite direction, several times in a raw. Slow and fast phase.
Pendular nystagmus – slow sinusoidal oscillation of the eyes that may occur in any direction, without fast phases.
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Facial sensation (CN V)
• V1 – ophthalmic
• V2 – maxillary
• V3 – mandibular
• Corneal reflex (V1 & CN VII)
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Facial strength
• Muscles of mastication (CN V)
• Muscles of facial expression (CN VII)
• Peripheral lesion – complete facial weakness
• Central lesion – forehead muscles usually spared
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Hearing (CN VIII)
Classification of hearing loss:
• Sensorineural (inner ear, cochlea or auditory nerve)
• Conductive (any cause that limits the amount of external sound from gaining access to the inner ear – cerumen impaction, middle ear fluid, ossicular chain fixation)
• Mixed loss (combination of the above)
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Vestibular function (CN VIII)
• Gait/balance observation
• Nystagmus (spontaneous and/or elicited)
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Vertigo
• Symptom of illusory movement.
• It is a SYMPTOM, not a DIAGNOSIS.
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Palatal movement (CN IX and X)
• Ask the patient to say “aaah” or yawn while sitting
• Gag reflex – generally no need to test it – 20% of normal individuals don’t have it
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Dysarthria (CN IX, X and XII)
• Dysarthria is an impairment of the motor functions necessary for speech production, it is not a language disorder.
• Listen for articulation errors, abnormalities of voice quality and irregularities of rate and rhythm.
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Head rotation/shoulder elevation (CN XI)
• Ask the patient to turn the head all the way to the left, and test the right sternocleidomastoid muscle
• Shoulder elevation
• Peripheral lesion – ipsilateral weakness of SCM and trapezius
• Central lesion – ipsilateral SCM and contralateral trapezius.
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Tongue movement (CN XII)
• Ask the patient to protrude the tongue and move it rapidly from side to side. Also, ask the patient to push the tongue against the cheek.
• CN XII receives descending cortical input from both hemispheres equally, except for genioglossus muscle (from contralateral hemisphere)
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MOTOR EXAMINATION
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Motor examination
• Gait
• Coordination
• Finger tapping
• Rapid alternating movements
• Finger-to-nose testing
• Heel-to-shin testing
• Pronator drift
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Motor examination
Involuntary movements • Tremor
• Myoclonus – rapid, shock-like muscle jerks
• Chorea – rapid, jerky twitches, similar to myoclonus but more random in location and more likely to blend into one another
• Athetosis – slow, writhing movements of the limbs
• Ballismus – large amplitude flinging limb movements
• Tics – abrupt, stereotyped, coordinated movements or vocalizations
• Dystonia – maintenance of an abnormal posture or repetitive twisting movements
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Strength testing
GRADING STRENGHT (Medical Research Council scale)
• 0 = no contraction
• 1= visible muscle twitch but no movement of the joint
• 2= weak contraction insufficient to overcome gravity
• 3= weak contraction able to overcome gravity but no additional resistance
• 4= weak contraction able to overcome some resistance but not full resistance
• 5= normal, able to overcome full resistance.
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Terminology of weakness
• Monoparesis
• Hemiparesis
• Paraparesis
• Quadriparesis
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Muscle bulk
• Inspected and palpated for evidence of atrophy
• Fasciculations
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Muscle tone
It is the slight residual tension present in voluntary relaxed muscle
Hypertonia:
• Spasticity
• Rigidity
• Paratonia
Hypotonia
Upper versus lower motor neuron lesions
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REFLEX EXAMINATION
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Tendon reflexes
• Biceps
• Triceps
• Brachioradialis
• Knee
• Ankle
Jendrassik maneuver
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Grading reflexes
• 0= absent
• 1= reduced (hypoactive)
• 2= normal
• 3= increased (hyperactive)
• 4= clonus
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Additional reflexes
• Plantar response – ONLY EXTENSOR response is called BABINSKI SIGN. Flexor or extensor.
• Superficial reflexes: abdominal, cremasteric
• Primitive reflexes: the grasp, root, snout and palmomental reflexes (FRONTAL RELEASE SIGN)
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SENSORY EXAMINATION
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Sensory examination • First test the primary sensory modalities (light touch, pain and temperature,
vibration, joint position sense), and then the discriminatory sensory functions (stereognosis, graphestesia, point localizations, two point discrimination and extinction)
• Light touch
• Pain/temperature
• Joint position sense
• Vibration
• Graphesthesia
• Stereognosis
• Two-point discrimination
• Localization of sensory deficits
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